NORTHERN CAIRNGORMS AVALANCHE HAZARD 1500 HRS SUN 20/2/05 The very cold Northerly airstream has continued with further snow showers. Drifting has led to deep windslab accumulations forming on lee slopes. Were tested on a South-East aspect at 1100 metres instabilities were present between the hard and soft slab layers. Recent avalanche debris was also noted in the same location. The avalanche hazard is Considerable (Category 3). AVALANCHE HAZARD OUTLOOK MON 21/2/05 Snow showers will continue on moderate North becoming North-East winds with very cold temperatures. Avalanches are likely due to weakly bonded windslab affecting mainly steep South-Easterly through to South-Westerly aspects above 850 metres. North-West to North-East sheltered gully tops and crag aprons will also be affected. The avalanche hazard will be Considerable (Category 3). CLIMBING CONDITIONS SNOW DISTRIBUTION: Good cover over the back of Cairngorm and on plateau. ICING: Plenty of climbing available in freezing conditions. COMMENT: Very high wind chill in the mountains today. LOCHABER AVALANCHE HAZARD 1500 HRS SUN 20/2/05 Localised areas of moderately bonded snow are present on sheltered South-East, South and South-West aspects above 950m. Some sheltered North-East and East facing crag aprons are also affected. The avalanche hazard is Moderate (Category 2). AVALANCHE HAZARD OUTLOOK MON 21/2/05 Snow showers and cold Northerly winds will continue overnight and during Monday. Localised areas of moderately bonded snow will be present on sheltered South-East, South and South-West aspects above 950m. Some sheltered North-East and East facing crag aprons will also be affected. The avalanche hazard will be Moderate (Category 2). Wind scoured snow slopes will remain frozen and stable. CLIMBING CONDITIONS SNOW DISTRIBUTION: Main accumulations in East facing corries. ICING: Freezing level remaining low. COMMENT: Good climbing conditions. Many routes in reasonable condition. GLENCOE AVALANCHE HAZARD 1500 HRS SUN 20/2/05 There are light accumulations of fresh snow above 500m but these new deposits are generally not significant. The greatest deposits are on Southerly aspects and in sheltered gullies above 800m. Some surface instability exists on steep scarp slopes and sheltered gully exits. The avalanche hazard in these areas is Moderate (Category 2). AVALANCHE HAZARD OUTLOOK MON 21/2/05 Cold N to NE winds will bring further snow showers to the area during Sunday night and Monday. The strong winds will continue to scour windward slopes producing windslab and surface instabilities. The areas affected will be on steep scarp slopes and gully exits in sheltered locations on SE to SW aspects mainly above 800m. Although these instabilities are not expected to be significant they will be weakly bonded and the avalanche hazard will be Moderate (Category 2) in these areas. CLIMBING CONDITIONS SNOW DISTRIBUTION: Snow above 500 metres with best cover above 800m. ICING: Freezing at all levels overnight becoming 300m on Monday. COMMENT: Best prospects for climbing are in the higher corries. Buttresses are improving. Verglas forming. SOUTHERN CAIRNGORMS AVALANCHE HAZARD 1500 HRS SUN 20/2/05 Deeper deposits of very dry multi-layered snow can be found in sheltered locations on E through S to SW aspects above 700 metres. Where accumulations overlie snow-ice they are poorly bonded. These areas are generally avoidable. Elsewhere is generally well bonded. The avalanche hazard is Considerable (Category 3). AVALANCHE HAZARD OUTLOOK MON 21/2/05 Further snow showers are expected throughout the period. Accumulations of dry light snow will be found in sheltered locations on E through S to SW aspects at all levels. Deposits will be unstable where they form over older snow-ice. Most of these areas may be avoided. The avalanche hazard will be Considerable (Category 3). CLIMBING CONDITIONS SNOW DISTRIBUTION: Best in main Cairngorms or on S aspects elsewhere. ICING: Watercourses offer best possibilities. COMMENT: Many tracks and paths are slow going due to being covered in ice. CREAG MEAGAIDH AVALANCHE HAZARD 1500 HRS SUN 20/2/05 A strong, cold Northerly wind has continued windslab development on East through South to South-West aspects above 700 metres. Very easy shears were obtained in field tests of dense slab deposits of 60 cm with triggering possible with low additional loads. The avalanche hazard is Considerable (Category 3). AVALANCHE HAZARD OUTLOOK MON 21/2/05 Snow showers on a strong North-East wind will continue to build dense, weakly bonded windslab on East through South to West aspects above 700 metres. Deep sub-surface instabilities will persist and avalanches are likely on the above mentioned aspects. The avalanche hazard will remain Considerable (Category 3). Unstable cornice development will also continue above steep lee aspects. CLIMBING CONDITIONS SNOW DISTRIBUTION: Snow at all levels. Variable with firm snow ice and breakable crust. Ski crampons essential for steep ski touring ascents. ICING: Some classic routes receiving traffic. Take care, as some gully exits are a little nasty with fresh windslab. COMMENT: A busy day in the Creag Meagaidh winter sporting arena. -------------------------------------------------------------------------------